Lung Compliance
Lung Compliance - Related Videos
05:49
Establishment of an Ex Vivo Lung Perfusion Rat Model for Translational Insights in Lung Transplantation
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Cited by 5 •
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Here, we describe the necessary steps for establishing a rat EVLP model and show the inflammatory profile associated with the perfused lungs. The aim is to propagate knowledge and experiences about the rat EVLP model, enabling the integral understanding of the biological responses associated with that revolutionary technique.
09:49
Measurement of the Pressure-volume Curve in Mouse Lungs
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Cited by 47 •
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Here we present a protocol to simply and reliably measure the lung pressure-volume curve in mice, showing that it is sufficiently sensitive to detect phenotypic parenchymal changes in two common lung pathologies, pulmonary fibrosis and emphysema. This metric provides a means to quantify the lung’s structural changes with developing pathology.
08:58
Development of a Neonatal Piglet Acute Lung Injury Model Recreating the Early Environment of Preterm Infant Lungs
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2025
This protocol describes the development of a neonatal piglet model of acute lung injury that models early pathogenic events occurring in the preterm lung, including sub-adequate surfactant quantity, hyperoxia, high-pressure ventilation, and inflammation, to facilitate understanding of molecular triggers of bronchopulmonary dysplasia and enhance therapeutic translation.
07:06
A Simple Method of Mouse Lung Intubation
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Cited by 50 •
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This paper describes a striaghforward and efficient method of intubating mice for pulmonary function measurements or pulmonary instillation, that allows the mice to recover and be studied at later times. The procedure involves an inexpensive fiberoptic light source that directly illuminates the trachea.
01:47
Lung Capacity
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2019
The air in the lungs is measured in volumes and capacities. Lung volume measures reflect the amount of air taken in, released, or left over after a lung function, like a single inhalation. Lung capacity measures are sums of two or more lung volume measures. There are four defined lung volume measures: tidal volume, inspiratory reserve volume, expiratory reserve volume, and residual volume. Tidal volume is the amount of air inhaled and exhaled in a normal breath. Inspiratory...
FAQs
Compliance is interpreted from the pressure-volume relationship rather than from pressure or volume alone. A given change in transpulmonary pressure can produce a relatively large or small change in lung volume. The size of that volume response indicates how readily the lung expands, allowing investigators to characterize respiratory mechanics and compare different mechanical states.
Elastic tissue properties influence compliance by determining how strongly the lung resists expansion and returns toward its previous size. When elastic recoil is prominent, more pressure is required to produce expansion, linking compliance measurements to the balance between inflation and recoil. This relationship helps explain how respiratory mechanics shape the breathing cycle.
Alveolar surface tension creates a force that opposes inflation. Pulmonary surfactant reduces that tension, so less pressure is needed to expand the alveolar system. Its contribution explains why surface properties matter alongside elastic tissue: changes in either factor can alter the pressure-volume response and therefore change the measured mechanical behavior of the lungs.
High and low compliance describe different mechanical demands, not simply different lung sizes. With high compliance, expansion requires comparatively little pressure, whereas low compliance reflects greater stiffness and a larger pressure requirement. This distinction helps explain why impaired respiratory function can increase the effort needed to ventilate the lungs, especially in conditions such as fibrosis.
An assessment begins by relating lung volume to transpulmonary pressure and examining the resulting pressure-volume behavior. The measurement is then interpreted by asking how much volume changes for a given pressure change. This approach provides a quantitative view of expansion and helps identify whether the lungs respond as relatively compliant or mechanically stiff.
In biology and medicine, compliance measurements connect pulmonary structure with functional performance. They can support studies of elastic recoil, alveolar surface tension, and the work required for inflation. Clinically, the information is relevant to impaired respiratory function, including fibrosis, and can inform reasoning about mechanical ventilation and how pressure affects lung expansion.